Dockerfile

FROM golang:1.21-alpine AS builder

WORKDIR /app

# Install dependencies
RUN apk add --no-cache git ca-certificates

# Copy go mod files
COPY go.mod go.sum ./
RUN go mod download

# Copy source code
COPY . .

# Build arguments for versioning
ARG VERSION=beta
ARG GIT_COMMIT=7e4ebc0
ARG BUILD_DATE=20250724

# Performing tidy check
RUN go mod tidy

# Build the binary
RUN CGO_ENABLED=0 GOOS=linux go build \
    -ldflags="-w -s -X main.Version=${VERSION} -X main.GitCommit=${GIT_COMMIT} -X main.BuildDate=${BUILD_DATE}" \
    -o cosmolet -v \
    ./cmd/cosmolet

# Final stage
FROM alpine:3.18

# Install runtime dependencies
RUN apk --no-cache add \
    ca-certificates \
    frr \
    frr-pythontools \
    && rm -rf /var/cache/apk/*

WORKDIR /app

# Copy binary from builder
COPY --from=builder /app/cosmolet .

# Health check
HEALTHCHECK --interval=30s --timeout=5s --start-period=5s --retries=3 \
    CMD wget --no-verbose --tries=1 --spider http://localhost:8080/healthz || exit 1

EXPOSE 8080 9090

CMD ["./cosmolet"]